圆柱绕流中扰动体强化传热和减阻

张喜东; 黄护林

doi:10.3969/j.issn.0438-1157.2014.02.017

您当前的位置：

首页 >

文章列表页 >

圆柱绕流中扰动体强化传热和减阻

流体力学与传递现象 | 更新时间：2025-12-10

- 圆柱绕流中扰动体强化传热和减阻
- Heat transfer enhancement and drag reduction with rod for flow around cylinder
- 化工学报 2014年第2期页码：488-494
- 作者机构：
  
  南京航空航天大学高新技术研究院,江苏,南京,210016
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.02.017
  中图分类号： K121
- 网络首发：2014-02-05，
  
  纸质出版：2014-02-05
- 稿件说明：
移动端阅览
张喜东, 黄护林. 圆柱绕流中扰动体强化传热和减阻[J]. 化工学报, 2014,(2):488-494.

ZHANG Xidong, HUANG Hulin. Heat transfer enhancement and drag reduction with rod for flow around cylinder[J]. CIESC Journal, 2014, (2): 488-494.
张喜东, 黄护林. 圆柱绕流中扰动体强化传热和减阻[J]. 化工学报, 2014,(2):488-494. DOI： 10.3969/j.issn.0438-1157.2014.02.017.

ZHANG Xidong, HUANG Hulin. Heat transfer enhancement and drag reduction with rod for flow around cylinder[J]. CIESC Journal, 2014, (2): 488-494. DOI： 10.3969/j.issn.0438-1157.2014.02.017.

摘要

以圆柱上游布置扰动体的双钝体绕流模式为研究对象，通过有限体积法数值研究了Reynolds数Re=1000时钝体直径比（d/D）、间隙率（S/D）对双钝体系统传热性能和系统阻力的影响规律。结果表明，小直径扰钝体对系统的对流换热更为有利，且系统的对流换热随间隙率的增大而递增。以等直径双钝体（d/D=1）系统为基准，总换热增长量（HI）随间隙率和扰动体直径的增大而减小，且间隙率小于临界值（S/D=4）时换热增长量波动比较明显。当d/D=0.1，S/D≥5时，系统的换热增长量为22.3%～25%，且此时系统的流动阻力可减小约40%，这表明上游小直径扰动体的利用在增强系统换热性能的同时也减小了系统的阻力。

Abstract

The influence of rod diameter d/D and center-to-center spacing ratio S/D on the forced convective heat transfer and flow drag for two isothermal cylinders in tandem arrangement are numerically investigated using a finite volume method for the three-dimensional channel. The working fluid is the eutectic alloy GaInSn. The convective heat transfer is much stronger as rod diameter decreases and as center-to-center spacing ratio increases. The overall increment of heat transfer decreases with the increase of center-to-center spacing ratio and rod diameter. Moreover

the overall increment of heat transfer fluctuates when the center-to-center spacing ratio is less than the critical value S/D=4. The overall increment of heat transfer is 22.3%—25%

and the system drag (including the rod and cylinder drags) is reduced by 40% at d/D = 0.1 and S/D≥5

indicating that the utilization of small rod to disturb the fluid can enhance the heat transfer and reduce the drag.

关键词

Keywords

references

浏览量

319

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

压力波强化横掠管束传热实验研究

圆柱颗粒结构修饰对填充床内流动和换热特性的影响

微小方形通道内近超临界压力二氧化碳流动换热特性实验研究

交织网状小通道热沉的传热特性

加热功率对三角形微肋阵内流动与对流换热特性的影响